Answer:
a- 50
b- 70
Explanation:
A straight line measures out to be 180 degrees
a- 40 + 90 + a = 180
b- 61 + b + 31 +18 = 180
a=50,b=70
you add all the known angle and subtract it by 180 and bam! you find the missing angle
5.4m questions
7.0m answers